| ; RUN: opt < %s -early-cse-memssa -gvn-hoist -S | FileCheck %s |
| |
| ; Make sure opt won't crash and that this pair of |
| ; instructions (load, icmp) is hoisted successfully |
| ; from bb45 and bb58 to bb41. |
| |
| @g_10 = external global i32, align 4 |
| @g_536 = external global i8*, align 8 |
| @g_1629 = external global i32**, align 8 |
| @g_963 = external global i32**, align 8 |
| @g_1276 = external global i32**, align 8 |
| |
| ;CHECK-LABEL: @func_22 |
| |
| define void @func_22(i32* %arg, i32* %arg1) { |
| bb: |
| br label %bb12 |
| |
| bb12: |
| %tmp3.0 = phi i32 [ undef, %bb ], [ %tmp40, %bb36 ] |
| %tmp7.0 = phi i32 [ undef, %bb ], [ %spec.select, %bb36 ] |
| %tmp14 = icmp eq i32 %tmp3.0, 6 |
| br i1 %tmp14, label %bb41, label %bb15 |
| |
| bb15: |
| %tmp183 = trunc i16 0 to i8 |
| %tmp20 = load i8*, i8** @g_536, align 8 |
| %tmp21 = load i8, i8* %tmp20, align 1 |
| %tmp23 = or i8 %tmp21, %tmp183 |
| store i8 %tmp23, i8* %tmp20, align 1 |
| %tmp5.i = icmp eq i8 %tmp23, 0 |
| br i1 %tmp5.i, label %safe_div_func_uint8_t_u_u.exit, label %bb8.i |
| |
| bb8.i: |
| %0 = udiv i8 1, %tmp23 |
| br label %safe_div_func_uint8_t_u_u.exit |
| |
| safe_div_func_uint8_t_u_u.exit: |
| %tmp13.in.i = phi i8 [ %0, %bb8.i ], [ 1, %bb15 ] |
| %tmp31 = icmp eq i8 %tmp13.in.i, 0 |
| %spec.select = select i1 %tmp31, i32 %tmp7.0, i32 53 |
| %tmp35 = icmp eq i32 %spec.select, 0 |
| br i1 %tmp35, label %bb36, label %bb41 |
| |
| bb36: |
| %tmp38 = sext i32 %tmp3.0 to i64 |
| %tmp40 = trunc i64 %tmp38 to i32 |
| br label %bb12 |
| |
| ;CHECK: bb41: |
| ;CHECK: %tmp47 = load i32, i32* %arg1, align 4 |
| ;CHECK: %tmp48 = icmp eq i32 %tmp47, 0 |
| |
| bb41: |
| %tmp43 = load i32, i32* %arg, align 4 |
| %tmp44 = icmp eq i32 %tmp43, 0 |
| br i1 %tmp44, label %bb52, label %bb45 |
| |
| ;CHECK: bb45: |
| ;CHECK-NOT: %tmp47 = load i32, i32* %arg1, align 4 |
| ;CHECK-NOT: %tmp48 = icmp eq i32 %tmp47, 0 |
| |
| bb45: |
| %tmp47 = load i32, i32* %arg1, align 4 |
| %tmp48 = icmp eq i32 %tmp47, 0 |
| br i1 %tmp48, label %bb50, label %bb64 |
| |
| bb50: |
| %tmp51 = load volatile i32**, i32*** @g_963, align 8 |
| unreachable |
| |
| bb52: |
| %tmp8.0 = phi i32 [ undef, %bb41 ], [ %tmp57, %bb55 ] |
| %tmp54 = icmp slt i32 %tmp8.0, 3 |
| br i1 %tmp54, label %bb55, label %bb58 |
| |
| bb55: |
| %tmp57 = add nsw i32 %tmp8.0, 1 |
| br label %bb52 |
| |
| ;CHECK: bb58: |
| ;CHECK-NOT: %tmp60 = load i32, i32* %arg1, align 4 |
| ;CHECK-NOT: %tmp61 = icmp eq i32 %tmp60, 0 |
| |
| bb58: |
| %tmp60 = load i32, i32* %arg1, align 4 |
| %tmp61 = icmp eq i32 %tmp60, 0 |
| br i1 %tmp61, label %bb62, label %bb64 |
| |
| bb62: |
| %tmp63 = load volatile i32**, i32*** @g_1276, align 8 |
| unreachable |
| |
| bb64: |
| %tmp65 = load volatile i32**, i32*** @g_1629, align 8 |
| unreachable |
| |
| ; uselistorder directives |
| uselistorder i32 %spec.select, { 1, 0 } |
| uselistorder i32* %arg1, { 1, 0 } |
| uselistorder label %bb64, { 1, 0 } |
| uselistorder label %bb52, { 1, 0 } |
| uselistorder label %bb41, { 1, 0 } |
| uselistorder label %safe_div_func_uint8_t_u_u.exit, { 1, 0 } |
| } |
| |
| define zeroext i8 @safe_div_func_uint8_t_u_u(i8 zeroext %arg, i8 zeroext %arg1) { |
| bb: |
| %tmp5 = icmp eq i8 %arg1, 0 |
| br i1 %tmp5, label %bb12, label %bb8 |
| |
| bb8: |
| %0 = udiv i8 %arg, %arg1 |
| br label %bb12 |
| |
| bb12: |
| %tmp13.in = phi i8 [ %0, %bb8 ], [ %arg, %bb ] |
| ret i8 %tmp13.in |
| } |